Cisco Catalyst 4500 Series, Software Configuration Manual

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Catalyst 4500 Series Switch, Cisco IOS Software Configuration Guide - Cisco IOS XE 3.9.xE and IOS 15.2(5)Ex
Chapter 27 Configuring EtherChannel and Link State Tracking
Configuring EtherChannel
Building configuration...
Current configuration:
!
interface Port-channel1
switchport
no port-channel standalone-disable
end
Switch#
This example shows how to verify the state of port channel interface 1:
Switch# show etherchannel 1 port-channel
Port-channels in the group:
---------------------------
Port-channel: Po13 (Primary Aggregator)
------------
Age of the Port-channel = 0d:00h:07m:57s
Logical slot/port = 11/13 Number of ports = 0
Port state = Port-channel Ag-Not-Inuse
Protocol = LACP
Port security = Disabled
Standalone = Enabled (independent mode)
Switch#
Configuring LACP Port Channel Min-links
Beginning in Cisco IOS Release 15.2(4)E, and Cisco IOS XE Release 3.8.0E, you can specify the
minimum number of active ports that must be in the link-up state and bundled in an EtherChannel for
the port channel interface to transition to the link-up state. Using EtherChannel min-links, you can
prevent low-bandwidth LACP EtherChannels from becoming active. Port channel min-links also cause
LACP EtherChannels to become inactive if they have too few active member ports to supply the required
minimum bandwidth.
Note
For a Multichassis EtherChannel (MEC), the LACP min-links command argument defines the minimum
number of physical links in each chassis for the MEC to be operational.
To configure the minimum number of links that are required for a port channel, perform the following
task:
Command Purpose
Step 1
Switch(config)# interface port-channel
channel-number
Enters interface configuration mode for a port-channel.
The valid range for channel-number is 1 to 256.